Stainless threaded fasteners could be classed as bolts, nuts, screws or washers. Stainless screws are either self tapping screws which came in stainless screw gau HYPERLINK "https://www.anzor.com.au/gauge-millimeter-conversion-chart"ge sizes and may require pilot holes for screws, stainless steel deck screws or stainless steel machine screws with machine threads which take a nut. Stainless steel bolts and nuts also come in a variety of types.
Different stainless steel grades are required for different applications. Grade 304 stainless steel is commonly used for general purpose applications where medium corrosion resistance is required. However grade 316 stainless should be used in coastal applications and for highly corrosive environments such as being submerged in sea water, higher grade grades of stainless steel should be used such as Super Duplex 2507. Stainless steel guidelines should be followed in both design and maintenance.
The strength of stainless steel fasteners can vary widely and come in a range of strength classes. Metric stainless steel fasteners which are unmarked are considered to have a minimum tensile strength of 500 MPa (Class 50) but many are made to 700 MPa, or Class 70 as stamped A2-70 or A4-70 with some made to 800 MPa (Class 80) and 1000 MPa (Class 100).
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